Datasheet

LTC3626
5
3626f
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency vs Input Voltage
(Burst Mode Operation)
Efficiency vs Frequency (Forced
Continuous Mode Operation)
Reference Voltage
vs Temperature
Internal MOSFET R
DS(ON)
vs Temperature
Temperature Monitor
vs Temperature
Efficiency vs Load Current
(Burst Mode Operation)
Efficiency vs Load Current (Forced
Continuous Mode Operation)
Efficiency vs Load Current
(Burst and Forced Continuous)
LOAD CURRENT (mA)
30
EFFICIENCY (%)
90
100
20
10
80
50
70
60
40
1 100 1000 10000
3626 G01
0
10
V
IN
= 4V
V
IN
= 8V
V
IN
= 12V
V
IN
= 20V
V
OUT
= 1.8V
LOAD CURRENT (mA)
30
EFFICIENCY (%)
90
100
20
10
80
50
70
60
40
1 100 1000 10000
3626 G02
0
10
V
IN
= 4V
V
IN
= 8V
V
IN
= 12V
V
IN
= 20V
V
OUT
= 1.8V
LOAD CURRENT (mA)
30
EFFICIENCY (%)
90
100
20
10
80
50
70
60
40
1 100 1000 10000
3626 G02
0
10
V
OUT
= 5V
V
OUT
= 3.3V
Burst Mode OPERATION
FORCED
CONTINUOUS
MODE OPERATION
INPUT VOLTAGE (V)
4
EFFICIENCY (%)
80
85
90
20
3626 G04
75
70
60
8
12
16
6 22
10
14
18
65
100
95
I
LOAD
= 1A
I
LOAD
= 2.5A
I
LOAD
= 100mA
I
LOAD
= 10mA
V
OUT
= 1.8V
LOAD CURRENT (mA)
30
EFFICIENCY (%)
90
100
20
10
80
50
70
60
40
1 100 1000 10000
3626 G05
0
10
f = 500kHz
f = 1MHz
f = 2MHz
f = 3MHz
V
OUT
= 3.3V
TEMPERATURE (°C)
–50
V
FB
(V)
0.602
0.604
0.606
25 75
3626 G06
0.600
0.598
–25 0
50 100 125
0.596
0.594
TEMPERATURE (°C)
–50
R
DS(ON)
(mΩ)
140
25
3626 G07
80
40
–25 0 50
20
0
160
120
100
60
75 100 125
TOP SWITCH
BOTTOM SWITCH
TEMPERATURE (°C)
–50
50
75
125
25 75
3626 G08
25
0
–25 0
50 100 125
–25
–50
100
1.6
1.7
2.0
1.5
1.4
1.2
1.1
1.9
MEASURED TEMPERATURE (°C)
TEMPERATURE MONITOR VOLTAGE (V)
T
A
= 25°C, PV
IN
= SV
IN
= 12V, f = 1MHz unless otherwise noted.